fix pic

SnailSword · web-flow · commit a1574f4e085e · 2017-03-29T23:55:53.000+08:00
diff --git a/Kmeans/README.md b/Kmeans/README.md
@@ -79,17 +79,23 @@ K-means算法结果如下图所示：
 - 当k=3时的结果
 
 <center>
+
 ![](./result/k_clusters3.png)
+
 </center>
 
 - 当k=4时的结果
 
 <center>
+
 ![](./result/k_clusters4.png)
+
 </center>
 
 - 当k=5时的结果
 
 <center>
+
 ![](./result/k_clusters5.png)
+
 </center>
